6dFGS gJ183450.8-572422
Observation
| Spectrum ID | 477842826_sp2 |
|---|---|
| Alt name | g1834508-572422 |
| z | 0.0548 |
| RA, Dec | 278.7117, -57.4061 |
| MJD | 60165.46 |
| SNR/Å B/R | 12.9/20.3 |
| Obs Airmass | 1.12 |
| SMSS ID | 477842826 |
| Closest SMSS | 11.62'', 1580175660 |
| SMSS Mean r6"ap | 16.7 ± 0.1 |
| 2MASS Kext | 12.4 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.083 |
| Power law αν | -1.27 ± 0.25 |
| log L5100,AGN | 42.29 ± 0.10 |
| log HβBr/[O III] | 0.03 ± 0.06 |
| log ML5100/M☉ | 6.74 ± 0.14 |
| log MHα/M☉ | 6.38 ± 0.06 |
| log MHβ/M☉ | 6.76 ± 0.14 |
| log M[O III]/M☉ | 6.86 ± 0.14 |
Spatial extraction & sky subtraction region
Spaxel scale: 1 arcsec² — Flux units: erg s⁻¹ cm⁻² Å⁻¹
Apertures: object (solid), background (dashed)
Spectrum decomposition
Emission line measurements
| Line | log L (erg s⁻¹) | FWHM (km s⁻¹) | σ (km s⁻¹) | EW (Å) |
|---|---|---|---|---|
| Hγ Narrow | 39.37 ± 0.23 | 226 ± 63 | 280 ± 36 | 5.53 ± 3.41 |
| Hγ Broad | 40.08 ± 0.13 | 2294 ± 229 | 550 ± 26 | 26.63 ± 5.11 |
| [O III] 4364 | 39.00 ± 0.37 | 213 ± 63 | 90 ± 25 | 2.31 ± 1.40 |
| He II Narrow | — | — | — | — |
| He II Broad | 39.63 ± 0.28 | 1984 ± 67 | 842 ± 27 | 10.45 ± 4.19 |
| Hβ Narrow | 39.59 ± 0.16 | 226 ± 63 | 280 ± 36 | 9.79 ± 3.02 |
| Hβ Broad | 40.58 ± 0.05 | 1919 ± 277 | 1189 ± 88 | 96.02 ± 6.47 |
| [O III] 5007 | 40.55 ± 0.03 | 226 ± 63 | 280 ± 36 | 91.21 ± 3.57 |
| He I Narrow | — | — | — | — |
| He I Broad | 39.80 ± 0.14 | 1629 ± 72 | 692 ± 29 | 18.22 ± 3.36 |
| [O I] 6300 | 39.04 ± 0.23 | 213 ± 63 | 90 ± 25 | 3.35 ± 1.17 |
| Hα Narrow | 39.98 ± 0.05 | 213 ± 63 | 90 ± 25 | 29.92 ± 1.48 |
| Hα Broad | 41.07 ± 0.01 | 1659 ± 82 | 803 ± 34 | 368.93 ± 5.76 |
| [N II] 6585 | 40.07 ± 0.03 | 213 ± 63 | 90 ± 25 | 36.73 ± 1.48 |
| [S II] 6718 | 39.60 ± 0.07 | 213 ± 63 | 90 ± 25 | 12.63 ± 1.30 |
| [S II] 6732 | 39.50 ± 0.09 | 213 ± 63 | 90 ± 25 | 10.17 ± 1.28 |
All narrow line widths are tied to narrow [O III] 5007Å. [O III] 5007Å and narrow Hβ include a second narrow component not tied to other narrow lines.
Emission summary
| Hα Broad SNR | 8.01 |
|---|---|
| Hβ Broad SNR | 2.68 |
| Hγ Broad SNR | 1.08 |
| AGN frac | 0.10 |
| Host frac | 0.90 |
| log L5100,Host | 43.24 |
| Fe II/Hβ | 0.45 |
| Fe II/[O III] | 0.48 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 1 |
balmer_snr | 1 |
hb_width | 1 |
balmer_width | 0 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.